fix error with undefined err

builtin/providers/aws/resource_aws_lambda_function.go

@@ -153,7 +153,7 @@ func resourceAwsLambdaFunctionCreate(d *schema.ResourceData, meta interface{}) e
 	//  http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/iam-roles-for-amazon-ec2.html#launch-instance-with-role-console
 	// Error creating Lambda function: InvalidParameterValueException: The role defined for the task cannot be assumed by Lambda.
 	err := resource.Retry(1*time.Minute, func() error {
-		_, err = conn.CreateFunction(params)
+		_, err := conn.CreateFunction(params)
 		if err != nil {
 			if awserr, ok := err.(awserr.Error); ok {
 				if awserr.Code() == "InvalidParameterValueException" {